Lenze E94A - Manual (Page 36)

2 Introduction
2.8 Multitasking in the Servo Drive 9400
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Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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2.8.3 Exchanging data between tasks
There are two options to exchange data between tasks:
1. via global variables
2. via user codes
In order to e.g. transfer a value from the ApplicationTask to the UserTask, first a global variable or a
user code is defined. The value is assigned to this variable/code in the ApplicationTask and read
from the same variable/code in the UserTask and e.g. assigned to a block input.

Note!
When creating the FB interconnection please bear in mind that the value of a global va-
riable or user code may change while processing the lower-priority task when being in-
terrupted by a higher-priority task.
The FB Editor prevents that the same variable or user code can be written several times.
Thus, a variable or user code cannot be changed in different tasks.